Refactor to use is_precompiled_letter in letters/utils.py

app/template_statistics/rest.py

@@ -14,6 +14,7 @@ from app.dao.templates_dao import (
     dao_get_template_by_id_and_service_id
 )
 
+from app.letters.utils import is_precompiled_letter
 from app.schemas import notification_with_template_schema
 from app.utils import cache_key_for_service_template_counter
 from app.errors import register_errors, InvalidRequest
@@ -48,11 +49,7 @@ def get_template_statistics_for_service_by_day(service_id):
             'template_id': str(data.template_id),
             'template_name': data.name,
             'template_type': data.template_type,
-            'precompiled_letter': (
-                data.template_type == 'letter' and
-                data.hidden and
-                data.name == current_app.config['PRECOMPILED_TEMPLATE_NAME']
-            )
+            'precompiled_letter': is_precompiled_letter(data)
         }
 
     return jsonify(data=[serialize(row) for row in stats])